EP0578520A1 - Modular PCB-holder for drawer-like inserting in an electronic rack - Google Patents

Modular PCB-holder for drawer-like inserting in an electronic rack Download PDF

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Publication number
EP0578520A1
EP0578520A1 EP93401505A EP93401505A EP0578520A1 EP 0578520 A1 EP0578520 A1 EP 0578520A1 EP 93401505 A EP93401505 A EP 93401505A EP 93401505 A EP93401505 A EP 93401505A EP 0578520 A1 EP0578520 A1 EP 0578520A1
Authority
EP
European Patent Office
Prior art keywords
structure according
frame
printed circuit
frames
bay
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Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP93401505A
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German (de)
French (fr)
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EP0578520B1 (en
Inventor
Gérard Nemoz
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Thales Avionics SAS
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Thales Avionics SAS
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Publication date
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Publication of EP0578520A1 publication Critical patent/EP0578520A1/en
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Publication of EP0578520B1 publication Critical patent/EP0578520B1/en
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    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
    • H05K7/00—Constructional details common to different types of electric apparatus
    • H05K7/14—Mounting supporting structure in casing or on frame or rack
    • H05K7/1461—Slidable card holders; Card stiffeners; Control or display means therefor

Definitions

  • the present invention relates to a modular structure for a printed circuit card holder, capable of engaging, like a drawer, in a bay of an electronic installation and of being connected, by means of connection means integrated on interconnection elements provided in the bottom of the bay (backplane interconnections).
  • structures of this kind used at present are in the form of housings, housing the printed circuit boards and whose entire rear face supports mechanical connection elements. and electrical suitable for both the rack and the printed circuit boards.
  • These connectors each comprise a generally parallelepiped body provided with fixing means and housing a plurality of elements of connection mounted in one or more insulating blocks; each of these elements comprises an external part shaped so as to cooperate with corresponding connection elements provided in the bottom of the bay, and an internal part connected to the electronic circuit of the card, usually by means of a strip of connectors.
  • the invention therefore more particularly aims to eliminate these drawbacks.
  • the structure according to the invention comprises at least one frame preferably made of a molded material, which delimits at least one flat volume of parallelepiped shape and whose edge of the inner contour, at least partially molded, has rebate elements on which a printed circuit board contained in said volume can be fixed, said frame comprising an anterior upright shaped so as to present at least one notch in which is engaged and fixed a set of connection elements, the parts of which internal are directly connected, via conductive connections, to conductive pads of the printed circuit, this frame further comprising two lateral flanks provided with fixing means, on each of which can be fixed either a closure plate, preferably in a thermally good conductive material, a second frame identical to the first.
  • the aforesaid anterior amount of the frame may include on its outer face, polarizing means capable of cooperating with corresponding means provided in the bottom of the bay, to prevent any possibility of connection error.
  • the rear upright of the frame can be shaped so as to receive a locking mechanism making it possible to lock the structure in the engaged position and connected to the bay.
  • the set of three connection groups E1, E2, E3 forms the equivalent of a usual connector.
  • each of these modular structures is provided with one (or two) locking device (s) involving a rocking lever 4, pivotally mounted around an axis 5 located near the underside and whose the upper part carries an oscillating locking part 6, a part of which in the form of a bolt engages in a conformation serving as a keeper G, provided on the rear face 3.
  • the lower end of the lever 4, in the form of a fork 8, is itself intended to engage in a stirrup 9 mounted to slide on the underside of the bay 1 and returned by a spring (not shown) towards the inside the bay, so as to bring the modular structure into permanent pressure on the bottom of the bay.
  • the fork 8 of the lever 4 comes to embrace the crossbar of the stirrup 9 while the connectors of the groups E1, E2, E3 of the modular structure M1 engage in the connectors of the bay 1 .
  • the locking M1 of the structure is then obtained by folding the lever 4 against the rear face, until the bolt 7 of the locking piece 6 engages on the keeper G ensuring a locking in position of the lever 4 .
  • the fork 8 exerts a traction on the stirrup 9 against the action of the spring, so that in the locked position, the structure M1 is subjected to a force oriented towards the bottom of the bay 1, which thus guarantees the quality of the contacts.
  • each modular structure M1 to M6 comprises at least one frame C of substantially rectangular shape preferably made of molded material, for example made of composite material or a light metal such as aluminum.
  • This frame C is at least partially molded so as to obtain rabbets F1, F2 on which is fixed a printed circuit board CI entirely housed in the interior volume delimited by the frame C.
  • the frame C comprises a cross member 11 which extends in its middle part, parallel to its front and rear uprights 12, 13, this cross member 11 being intended to ensure the maintenance and stiffening of the printed circuit board CI , and the other, a second provisional lever.
  • the rear upright 13 of the frame C has an L-shaped outer rabbet FE provided in its middle part with a conformation forming a half keeper G 'and comprising, at its ends, two transverse holes 15, 16 formed in the wing of the rabbet FE which extends the frame C longitudinally and one of which is intended to receive the pivot axis of the lever 4.
  • the anterior upright 12 here comprises three identical notches 17, 18, 19 of substantially parallelepiped shape, which open at its outer edge 20.
  • connection groups E1, E2, E3 which have a corresponding shape and which each comprise a plurality of connection elements axially parallel to the longitudinal axis of the frame C and secured to each other by their central part thanks to a coating 21 of an electrically insulating plastic material.
  • frame C is designed in such a way that two identical frames can be assembled to each other in such a way that the notches 17, 18, 19 of the front uprights 12 are in coincidence, that the L-shaped rebates posterior uprights define a groove in which the lever 4 is partially housed and that the holes 15, 16 are two to two coaxial so as to be able to receive the axis of said lever 4.
  • the fixing of the two frames, once assembled, can be done by screwing. However, in the case where the frames are provided with slides allowing their assembly by total or partial sliding, this fixing by screwing can be avoided.
  • each of the frames C is provided with holes 22 allowing the fixing by screwing of covers, which may consist of flat plates CP1, CP2 whose outline substantially matches that of the lateral flanks of the frame C on which it is fixed.
  • the frame could include two longitudinal slides in which said cover can engage by sliding.
  • the locking can be obtained by screwing in a single point.
  • the longitudinal edges of the frame could include tabs L1 intended to come to cooperate with corresponding tabs L2 provided on the longitudinal edges of the cover CP2, the locking of the cover CP2 then being obtained after a partial relative sliding allowing engage the tabs L2 of the cover CP2 under the tabs L1 of the frame C2.
  • covers CP'1, CP'2 may possibly have a curved shape so as to increase the interior volume of the modular structure and thus allow the use of larger electronic components or the addition of an additional directly linked printed circuit. on the first (mechanically and / or electrically).
  • the outer faces of the upper and lower uprights each have a longitudinal groove, while the inner edges of these uprights are provided with semi-cylindrical notches which, once the assembly of two frames made , delimit through holes O intended to ensure ventilation of the interior volume of the modular structure.
  • the covers CP1, CP2 - CP'1, CP'2 can be made of a thermally good conductive material so as to be able to serve as heat sinks.
  • connection assemblies E1, E2, E3 which engage in the notches 17, 18, 19 have a generally rectangular substantially rectangular shape, can be made in two blocks B1, B2 - B'1, B'2 assembling l to each other at a junction plane parallel to the plane of the printed circuit board CI.
  • each block is associated with a corresponding face of the printed circuit board and comprises two rows of connectors, the internal ends of which are extended by elastic tongues 26 coming to bear by their ends on conductive pads 27 provided on the printed circuit.
  • connection blocks B2, B2 - B'2, B'2 inside the notches 17, 18, 19 is ensured by means of conformations of complementary shape of said notches and of said blocks which ensure axial locking of the latter, and to the covers CP1, CP2 - CP'1, CP'2 (or to parts acting as a cover) which come to overlap on the notches 17, 18, 19.
  • It may include two frames C1, C2 assembled together and each carrying a printed circuit board CI1, CI2 and two flat covers CP1, CP2, as shown in FIG. 5.
  • the printed circuits CI1, CI2 carried by these two frames C1, C2 can be directly interconnected (for example using plug-in connectors), so as to reduce the number of connections between each of the cards CI1, CI2 and the rack backplane connectors 1.
  • This structure could include two frames C'1, C'2 similar to those of FIGS. 1 to 5 but provided with domed covers CP'1, CP'2 connected to the frames C'1, C'2 by means of a peripheral seal j1, j2 serving as a spacer (the thickness of which can be determined as required).
  • Another advantage of the structures described above consists in that one of the printed circuit boards can include recesses allowing the passage of components carried by the other printed circuit board.
  • the printed circuit CI1 comprises a rectangular recess 30 through which the housing 31 of a large electronic component carried by the other printed circuit CI2 passes.
  • the maximum number of frames used in the same structure is not limited to two: This number is variable depending on the needs and the design of rack 1.

Landscapes

  • Engineering & Computer Science (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Coupling Device And Connection With Printed Circuit (AREA)
  • Casings For Electric Apparatus (AREA)
  • Mounting Of Printed Circuit Boards And The Like (AREA)
  • Combinations Of Printed Boards (AREA)

Abstract

The modular structure according to the invention comprises at least one frame (C) produced preferably in moulded material, on which a printed circuit board (CI) is fixed, and the front upright (12) of which has at least one recess (17, 18, 19) in which is engaged a group (E1, E2, E3) of connection elements, the frame (C) comprising two side flanks equipped with fixing means, on each of which either a closing plate or a second frame, identical to the first one, can be fixed. The invention especially allows the reduction, to a single level, of the connections between the printed circuit boards and the output connector of the structure. <IMAGE>

Description

La présente invention concerne une structure modulaire porte-carte de circuit imprimé, apte à venir s'engager, à la façon d'un tiroir, dans une baie d'une installation électronique et à se connecter, grâce à des moyens de connexion intégrés sur des éléments d'interconnexion prévus dans le fond de la baie (interconnexions fond de panier).The present invention relates to a modular structure for a printed circuit card holder, capable of engaging, like a drawer, in a bay of an electronic installation and of being connected, by means of connection means integrated on interconnection elements provided in the bottom of the bay (backplane interconnections).

Elle s'applique notamment, mais non exclusivement, aux installations électroniques situées à bord d'un aérodyne.It applies in particular, but not exclusively, to electronic installations located on board an aerodyne.

D'une manière générale, on sait que les structures de ce genre utilisées à l'heure actuelle, se présentent sous la forme de boîtiers, logeant les cartes de circuit imprimé et dont l'ensemble de la face arrière supporte des éléments de connexion mécanique et électrique appropriés à la fois à ceux de la baie et à ceux des cartes de circuit imprimé.Generally, it is known that structures of this kind used at present, are in the form of housings, housing the printed circuit boards and whose entire rear face supports mechanical connection elements. and electrical suitable for both the rack and the printed circuit boards.

Il s'avère que cette solution présente un certain nombre d'inconvénients.It turns out that this solution has a number of drawbacks.

Elle implique tout d'abord plusieurs niveaux de connexion entre la carte de circuit imprimé et les connecteurs fixés sur la face arrière de la baie : Ces connecteurs comprennent chacun un corps en général parallélépipédique muni de moyens de fixation et logeant une pluralité d'éléments de connexion montés dans un ou plusieurs blocs isolants ; chacun de ces éléments comprend une partie externe conformée de manière à venir coopérer avec des éléments de connexion correspondants prévus dans le fond de la baie, et une partie interne reliée au circuit électronique de la carte, habituellement par l'intermédiaire d'une barrette de connecteurs.First of all, it involves several levels of connection between the printed circuit board and the connectors fixed on the rear face of the bay: These connectors each comprise a generally parallelepiped body provided with fixing means and housing a plurality of elements of connection mounted in one or more insulating blocks; each of these elements comprises an external part shaped so as to cooperate with corresponding connection elements provided in the bottom of the bay, and an internal part connected to the electronic circuit of the card, usually by means of a strip of connectors.

Par ailleurs, cette solution est relativement lourde, coûteuse à réaliser et est thermiquement peu satisfaisante : Elle se prête mal aux échanges thermiques nécessaires notamment pour évacuer les calories dégagées par les composants électroniques portés par la carte de circuit imprimé.Furthermore, this solution is relatively heavy, costly to produce and is thermally unsatisfactory: It lends itself poorly to the heat exchanges necessary in particular for removing the calories released by the electronic components carried by the printed circuit board.

C'est enfin une structure relativement figée et peu associative qui n'offre donc que des possibilités limitées notamment en matière d'implantation et de dimension des composants qu'elle est censée recevoir.Finally, it is a relatively fixed structure with little association which therefore offers only limited possibilities, particularly in terms of layout and dimension of the components that it is supposed to receive.

L'invention a donc plus particulièrement pour but de supprimer ces inconvénients.The invention therefore more particularly aims to eliminate these drawbacks.

Elle propose une structure modulaire relativement simple, tant en ce qui concerne sa conception que sa mise en oeuvre et qui permet notamment :

  • la réalisation de boîtiers ou tiroirs d'épaisseur variable, pouvant contenir une ou plusieurs cartes de circuit imprimé interconnectables directement ;
  • le maintien efficace et le raidissement des cartes de circuit imprimé ;
  • l'intégration des blocs d'éléments de connexion à la structure sans avoir à utiliser les autres éléments des connecteurs classiques (en particulier, leur partie mécanique) ;
  • la réduction, à un seul niveau, des connexions entre les cartes du circuit imprimé et le connecteur de sortie de la structure modulaire ;
  • l'établissement de ponts de conduction thermique directe entre les éléments de circuit imprimé sièges d'émission calorifiques et des parois externes thermiquement conductrices jouant le rôle de dissipateurs thermiques ;
  • l'intégration de moyens de positionnement, de détrompage et de verrouillage des boîtiers.
It offers a relatively simple modular structure, both in terms of its design and its implementation, and which allows in particular:
  • the production of boxes or drawers of variable thickness, which may contain one or more directly interconnectable printed circuit boards;
  • effectively maintaining and stiffening printed circuit boards;
  • the integration of the blocks of connection elements to the structure without having to use the other elements of the conventional connectors (in particular, their mechanical part);
  • reduction, to a single level, of the connections between the printed circuit boards and the output connector of the modular structure;
  • the establishment of direct thermal conduction bridges between the printed circuit elements heat emission seats and thermally conductive external walls playing the role of heat sinks;
  • the integration of means for positioning, coding and locking the boxes.

Pour parvenir à ces résultats, la structure selon l'invention comprend au moins un cadre réalisé de préférence en une matière moulée, qui délimite au moins un volume plat de forme parallélépipédique et dont le bord du contour intérieur, au moins en partie mouluré, présente des éléments de feuillure sur lesquels peut être fixée une carte de circuit imprimé contenue dans ledit volume, ledit cadre comprenant un montant antérieur conformé de manière à présenter au moins une échancrure dans laquelle est engagé et fixé un ensemble d'éléments de connexion dont les parties internes sont directement reliées, par l'intermédiaire de liaisons conductrices, à des plages conductrices du circuit imprimé, ce cadre comprenant, par ailleurs, deux flancs latéraux munis de moyens de fixation, sur chacun desquels peuvent venir se fixer soit une plaque de fermeture, de préférence en un matériau thermiquement bon conducteur, soit un deuxième cadre identique au premier.To achieve these results, the structure according to the invention comprises at least one frame preferably made of a molded material, which delimits at least one flat volume of parallelepiped shape and whose edge of the inner contour, at least partially molded, has rebate elements on which a printed circuit board contained in said volume can be fixed, said frame comprising an anterior upright shaped so as to present at least one notch in which is engaged and fixed a set of connection elements, the parts of which internal are directly connected, via conductive connections, to conductive pads of the printed circuit, this frame further comprising two lateral flanks provided with fixing means, on each of which can be fixed either a closure plate, preferably in a thermally good conductive material, a second frame identical to the first.

Avantageusement, le susdit montant antérieur du cadre pourra comprendre sur sa face extérieure, des moyens de détrompage aptes à coopérer avec des moyens correspondants prévus dans le fond de la baie, pour interdire toute possibilité d'erreur de connexion.Advantageously, the aforesaid anterior amount of the frame may include on its outer face, polarizing means capable of cooperating with corresponding means provided in the bottom of the bay, to prevent any possibility of connection error.

Par ailleurs, le montant postérieur du cadre pourra être conformé de manière à recevoir un mécanisme de verrouillage permettant de verrouiller la structure en position engagée et connectée à la baie.Furthermore, the rear upright of the frame can be shaped so as to receive a locking mechanism making it possible to lock the structure in the engaged position and connected to the bay.

Un mode d'exécution de l'invention sera décrit ci-après, à titre d'exemple non limitatif, avec référence aux dessins annexés dans lesquels :

  • La figure 1 est une vue en perspective montrant une baie à l'intérieur de laquelle sont disposées des structures modulaires porte-carte selon l'invention ;
  • La figure 2 est une vue de côté d'un cadre utilisé dans chacune des structures modulaires ;
  • La figure 3 est une vue en élévation de la face antérieure du cadre, muni des blocs de connexion ;
  • La figure 4 est une vue en perspective d'une structure modulaire à l'état assemblé qui comporte au moins deux des cadres illustrés figures 1 à 3 ;
  • Les figures 5, 6 et 7 sont des vues en perspective éclatée illustrant trois variantes d'exécution d'une structure modulaire selon l'invention.
An embodiment of the invention will be described below, by way of non-limiting example, with reference to the accompanying drawings in which:
  • Figure 1 is a perspective view showing a bay inside which are arranged modular card holder structures according to the invention;
  • Figure 2 is a side view of a frame used in each of the modular structures;
  • Figure 3 is an elevational view of the front face of the frame, provided with connection blocks;
  • Figure 4 is a perspective view of a modular structure in the assembled state which includes at least two of the frames illustrated in Figures 1 to 3;
  • Figures 5, 6 and 7 are exploded perspective views illustrating three alternative embodiments of a modular structure according to the invention.

Telles que représentées sur la figure 1, les structures modulaires M₁ à M₆, dont l'une (M₁) se trouve partiellement engagée dans la baie d'un appareil électronique, présente une forme plate, sensiblement parallélépipédique dont la face antérieure (visible sur les figures 2 et 3) est munie de trois groupes de connexion E₁, E₂, E₃, destinés à coopérer avec des connecteurs correspondants placés dans le fond de la baie 1 (connecteurs fond de panier). L'ensemble des trois groupes de connexion E₁, E₂, E₃ forme l'équivalent d'un connecteur usuel.As shown in Figure 1, the modular structures M₁ to M₆, one of which (M₁) is partially engaged in the bay of an electronic device, has a flat shape, substantially parallelepiped whose front side (visible in Figures 2 and 3) is provided with three connection groups E₁, E₂, E₃, intended to cooperate with corresponding connectors placed in the bottom of the bay 1 (backplane connectors). The set of three connection groups E₁, E₂, E₃ forms the equivalent of a usual connector.

La face postérieure 3 de chacune de ces structures modulaires est munie d'un (ou de deux) dispositif(s) de verrouillage faisant intervenir un levier basculant 4, monté pivotant autour d'un axe 5 situé à proximité de la face inférieure et dont la partie supérieure porte une pièce de verrouillage oscillante 6 dont une partie en forme de pêne vient s'engager dans une conformation servant de gâche G, prévue sur la face postérieure 3.The rear face 3 of each of these modular structures is provided with one (or two) locking device (s) involving a rocking lever 4, pivotally mounted around an axis 5 located near the underside and whose the upper part carries an oscillating locking part 6, a part of which in the form of a bolt engages in a conformation serving as a keeper G, provided on the rear face 3.

L'extrémité inférieure du levier 4, en forme de fourche 8, est elle-même destinée à venir s'engager dans un étrier 9 monté coulissant sur la face inférieure de la baie 1 et rappelé par un ressort (non représenté) vers l'intérieur de la baie, de manière à amener la structure modulaire en pression permanente sur le fond de la baie.The lower end of the lever 4, in the form of a fork 8, is itself intended to engage in a stirrup 9 mounted to slide on the underside of the bay 1 and returned by a spring (not shown) towards the inside the bay, so as to bring the modular structure into permanent pressure on the bottom of the bay.

Le fonctionnement de ce mécanisme de verrouillage est alors le suivant :The operation of this locking mechanism is then as follows:

Lors de l'engagement de la structure M₁ dans la baie 1, la pièce de verrouillage 6 est à l'état déverrouillé et le levier 4 se trouve légèrement basculé vers l'arrière dans la position indiquée sur les figures 5 et 6.When the structure M₁ is engaged in the bay 1, the locking part 6 is in the unlocked state and the lever 4 is slightly tilted backwards in the position indicated in FIGS. 5 and 6.

En fin de course d'engagement, la fourche 8 du levier 4 vient embrasser la barre transversale de l'étrier 9 tandis que les connecteurs des groupes E₁, E₂, E₃ de la structure modulaire M₁ s'engagent dans les connecteurs de la baie 1.At the end of the engagement race, the fork 8 of the lever 4 comes to embrace the crossbar of the stirrup 9 while the connectors of the groups E₁, E₂, E₃ of the modular structure M₁ engage in the connectors of the bay 1 .

Le verrouillage M₁ de la structure s'obtient ensuite en rabattant le levier 4 contre la face postérieure, jusqu'à ce que le pêne 7 de la pièce de verrouillage 6 vienne en prise sur la gâche G en assurant un blocage en position du levier 4.The locking M₁ of the structure is then obtained by folding the lever 4 against the rear face, until the bolt 7 of the locking piece 6 engages on the keeper G ensuring a locking in position of the lever 4 .

Au cours du basculement du levier 4, la fourche 8 exerce une traction sur l'étrier 9 contre l'action du ressort, de sorte qu'en position verrouillée, la structure M₁ est soumise à une force orientée en direction du fond de la baie 1, ce qui garantit ainsi la qualité des contacts.During the tilting of the lever 4, the fork 8 exerts a traction on the stirrup 9 against the action of the spring, so that in the locked position, the structure M₁ is subjected to a force oriented towards the bottom of the bay 1, which thus guarantees the quality of the contacts.

Conformément à l'invention, chaque structure modulaire M₁ à M₆ comprend au moins un cadre C de forme sensiblement rectangulaire de préférence en matière moulée, par exemple en matière composite ou en un métal léger tel que de l'aluminium.According to the invention, each modular structure M₁ to M₆ comprises at least one frame C of substantially rectangular shape preferably made of molded material, for example made of composite material or a light metal such as aluminum.

Le bord intérieur de ce cadre C est au moins partiellement mouluré de manière à obtenir des feuillures F₁, F₂ sur lesquelles vient se fixer une carte de circuit imprimé CI entièrement logée dans le volume intérieur délimité par le cadre C.The inner edge of this frame C is at least partially molded so as to obtain rabbets F₁, F₂ on which is fixed a printed circuit board CI entirely housed in the interior volume delimited by the frame C.

Dans cet exemple, le cadre C comprend une traverse 11 qui s'étend dans sa partie médiane, parallèlement à ses montants antérieur et postérieur 12, 13, cette traverse 11 étant destinée à assurer le maintien et le raidissement de la carte de circuit imprimé CI, et l'autre, d'un deuxième levier provisionnel.In this example, the frame C comprises a cross member 11 which extends in its middle part, parallel to its front and rear uprights 12, 13, this cross member 11 being intended to ensure the maintenance and stiffening of the printed circuit board CI , and the other, a second provisional lever.

Le montant postérieur 13 du cadre C présente une feuillure extérieure FE en forme de L munie en sa partie médiane d'une conformation formant une demi gâche G' et comportant, à ses extrémités, deux perçages transversaux 15, 16 pratiqués dans l'aile de la feuillure FE qui prolonge longitudinalement le cadre C et dont l'un est destiné à recevoir l'axe de pivotement du levier 4.The rear upright 13 of the frame C has an L-shaped outer rabbet FE provided in its middle part with a conformation forming a half keeper G 'and comprising, at its ends, two transverse holes 15, 16 formed in the wing of the rabbet FE which extends the frame C longitudinally and one of which is intended to receive the pivot axis of the lever 4.

Le montant antérieur 12 comprend, ici, trois échancrures identiques 17, 18, 19 de forme sensiblement parallélépipédique, qui s'ouvrent au niveau de son bord extérieur 20.The anterior upright 12 here comprises three identical notches 17, 18, 19 of substantially parallelepiped shape, which open at its outer edge 20.

Ces trois échancrures 17, 18, 19 sont destinées à recevoir les trois groupes de connexion E₁, E₂, E₃ qui présentent une forme correspondante et qui comprennent chacun une pluralité d'éléments de connexion axés parallèlement à l'axe longitudinal du cadre C et solidarisés les uns aux autres par leur partie centrale grâce à un enrobage 21 en une matière plastique électriquement isolante.These three notches 17, 18, 19 are intended to receive the three connection groups E₁, E₂, E₃ which have a corresponding shape and which each comprise a plurality of connection elements axially parallel to the longitudinal axis of the frame C and secured to each other by their central part thanks to a coating 21 of an electrically insulating plastic material.

La conformation générale du cadre C est conçue de telle manière que deux cadres identiques puissent s'assembler l'un à l'autre de telle manière que les échancrures 17, 18, 19 des montants antérieurs 12 soient en coïncidence, que les feuillures en L des montants postérieurs délimitent une rainure dans laquelle vient partiellement se loger le levier 4 et que les perçages 15, 16 soient deux à deux coaxiaux de manière à pouvoir recevoir l'axe dudit levier 4. La fixation des deux cadres, une fois assemblés, peut s'effectuer par vissage. Toutefois, dans le cas où les cadres sont munis de glissières permettant leur assemblage par coulissement total ou partiel, cette fixation par vissage peut être évitée.The general conformation of frame C is designed in such a way that two identical frames can be assembled to each other in such a way that the notches 17, 18, 19 of the front uprights 12 are in coincidence, that the L-shaped rebates posterior uprights define a groove in which the lever 4 is partially housed and that the holes 15, 16 are two to two coaxial so as to be able to receive the axis of said lever 4. The fixing of the two frames, once assembled, can be done by screwing. However, in the case where the frames are provided with slides allowing their assembly by total or partial sliding, this fixing by screwing can be avoided.

Par ailleurs, chacun des cadres C est muni de perçages 22 permettant la fixation par vissage de capots, pouvant consister en des plaques planes CP₁, CP₂ dont le contour épouse sensiblement celui des flancs latéraux du cadre C sur lequel il vient se fixer.Furthermore, each of the frames C is provided with holes 22 allowing the fixing by screwing of covers, which may consist of flat plates CP₁, CP₂ whose outline substantially matches that of the lateral flanks of the frame C on which it is fixed.

Bien entendu, l'invention ne se limite pas à ce mode de fixation.Of course, the invention is not limited to this method of attachment.

Ainsi, le cadre pourrait comprendre deux glissières longitudinales dans lesquelles peut s'engager par coulissement ledit capot. Dans ce cas, le verrouillage peut être obtenu par vissage en un seul point.Thus, the frame could include two longitudinal slides in which said cover can engage by sliding. In this case, the locking can be obtained by screwing in a single point.

De même, les bordures longitudinales du cadre pourraient comprendre des languettes L₁ destinées à venir coopérer avec des languettes correspondantes L₂ prévues sur les bordures longitudinales du capot CP₂, le verrouillage du capot CP₂ étant alors obtenu au terme d'un coulissement relatif partiel permettant d'engager les languettes L₂ du capot CP₂ sous les languettes L₁ du cadre C₂.Similarly, the longitudinal edges of the frame could include tabs L₁ intended to come to cooperate with corresponding tabs L₂ provided on the longitudinal edges of the cover CP₂, the locking of the cover CP₂ then being obtained after a partial relative sliding allowing engage the tabs L₂ of the cover CP₂ under the tabs L₁ of the frame C₂.

Ces capots CP'₁, CP'₂ peuvent éventuellement présenter une forme bombée de manière à augmenter le volume intérieur de la structure modulaire et à permettre ainsi l'emploi de composants électroniques plus volumineux ou l'ajout d'un circuit imprimé supplémentaire directement lié au premier (mécaniquement et/ou électriquement).These covers CP'₁, CP'₂ may possibly have a curved shape so as to increase the interior volume of the modular structure and thus allow the use of larger electronic components or the addition of an additional directly linked printed circuit. on the first (mechanically and / or electrically).

Dans les exemples représentés sur les figures 5 et 6, les faces extérieures des montants supérieur et inférieur présentent chacune une gorge longitudinale, tandis que les bords intérieurs de ces montants sont munis d'encoches hémicylindriques qui, une fois l'assemblage de deux cadres réalisés, délimitent des orifices traversants O destinés à assurer la ventilation du volume intérieur de la structure modulaire.In the examples shown in Figures 5 and 6, the outer faces of the upper and lower uprights each have a longitudinal groove, while the inner edges of these uprights are provided with semi-cylindrical notches which, once the assembly of two frames made , delimit through holes O intended to ensure ventilation of the interior volume of the modular structure.

Avantageusement, les capots CP₁, CP₂ - CP'₁, CP'₂ peuvent être réalisés en un matériau thermiquement bon conducteur de manière à pouvoir servir de dissipateurs thermiques.Advantageously, the covers CP₁, CP₂ - CP'₁, CP'₂ can be made of a thermally good conductive material so as to be able to serve as heat sinks.

Dans ce cas, il est possible de faire en sorte que les composants sujets à de fortes dissipations thermiques soient en contact thermique avec les capots CP₁, CP₂ - CP'₁, CP'₂, soit directement, soit par l'intermédiaire d'éléments servant de ponts de conduction thermique.In this case, it is possible to ensure that the components subject to strong heat dissipation are in thermal contact with the covers CP₁, CP₂ - CP'₁, CP'₂, either directly or by through elements serving as thermal conduction bridges.

Ces dispositions permettent donc de résoudre, d'une façon particulièrement efficace, les problèmes de dissipation thermique à la fois par conduction sur des éléments présentant des surfaces de dissipation thermique importantes et par ventilation interne de l'ensemble de la structure et des circuits électroniques qu'elle renferme.These provisions therefore make it possible to solve, in a particularly effective manner, the problems of heat dissipation both by conduction on elements having large heat dissipation surfaces and by internal ventilation of the entire structure and of the electronic circuits which 'it contains.

Les ensembles de connexion E₁, E₂, E₃ qui s'engagent dans les échancrures 17, 18, 19 présentent une forme générale sensiblement rectangulaire parallélépipédique, peuvent être réalisés en deux blocs B₁, B₂ - B'₁, B'₂ s'assemblant l'un à l'autre au niveau d'un plan de jonction parallèle au plan de la carte de circuit imprimé CI.The connection assemblies E₁, E₂, E₃ which engage in the notches 17, 18, 19 have a generally rectangular substantially rectangular shape, can be made in two blocks B₁, B₂ - B'₁, B'₂ assembling l to each other at a junction plane parallel to the plane of the printed circuit board CI.

Dans l'exemple de la figure 2, chaque bloc est associé à une face correspondante de la carte de circuit imprimé et comprend deux rangées de connecteurs dont les extrémités internes sont prolongées par des languettes élastiques 26 venant porter par leurs extrémités sur des plages conductrices 27 prévues sur le circuit imprimé.In the example of FIG. 2, each block is associated with a corresponding face of the printed circuit board and comprises two rows of connectors, the internal ends of which are extended by elastic tongues 26 coming to bear by their ends on conductive pads 27 provided on the printed circuit.

Avantageusement, le maintien des blocs de connexion B₁, B₂ - B'₁, B'₂ à l'intérieur des échancrures 17, 18, 19 est assuré grâce à des conformations de forme complémentaire desdites échancrures et desdits blocs qui assurent un blocage axial de ces derniers, et aux capots CP₁, CP₂ - CP'₁, CP'₂ (ou à des pièces faisant office de capot) qui viennent en recouvrement sur les échancrures 17, 18, 19.Advantageously, the maintenance of the connection blocks B₂, B₂ - B'₂, B'₂ inside the notches 17, 18, 19 is ensured by means of conformations of complementary shape of said notches and of said blocks which ensure axial locking of the latter, and to the covers CP₁, CP₂ - CP'₁, CP'₂ (or to parts acting as a cover) which come to overlap on the notches 17, 18, 19.

Un tel montage évite d'avoir à utiliser des structures complètes de connecteur telles qu'elles se trouvent disponibles dans le commerce et qui équipaient jusqu'ici les tiroirs des baies.Such an arrangement avoids having to use complete connector structures as they are commercially available and which have hitherto fitted the drawers of the racks.

De par sa conception, la structure modulaire précédemment décrite est à composition variable.By design, the previously described modular structure is of variable composition.

Elle peut comprendre deux cadres C₁, C₂ assemblés l'un à l'autre et portant chacun une carte de circuit imprimé CI₁, CI₂ et deux capots plats CP₁, CP₂, comme représenté figure 5.It may include two frames C₁, C₂ assembled together and each carrying a printed circuit board CI₁, CI₂ and two flat covers CP₁, CP₂, as shown in FIG. 5.

Avantageusement, les circuits imprimés CI₁, CI₂ portés par ces deux cadres C₁, C₂, pourront être directement interconnectés (par exemple à l'aide de connecteurs enfichables), de manière à réduire le nombre de connexions entre chacune des cartes CI₁, CI₂ et les connecteurs fond de panier de la baie 1.Advantageously, the printed circuits CI₁, CI₂ carried by these two frames C₁, C₂, can be directly interconnected (for example using plug-in connectors), so as to reduce the number of connections between each of the cards CI₁, CI₂ and the rack backplane connectors 1.

Cette structure pourrait comprendre deux cadres C'₁, C'₂ similaires à ceux des figures 1 à 5 mais munis de capots bombés CP'₁, CP'₂ reliés aux cadres C'₁, C'₂ par l'intermédiaire d'un joint périphérique j₁, j₂ servant d'espaceur (dont l'épaisseur peut être déterminée en fonction des besoins).This structure could include two frames C'₁, C'₂ similar to those of FIGS. 1 to 5 but provided with domed covers CP'₁, CP'₂ connected to the frames C'₁, C'₂ by means of a peripheral seal j₁, j₂ serving as a spacer (the thickness of which can be determined as required).

Un autre avantage des structures précédemment décrites consiste en ce que l'une des cartes de circuit imprimé peut comprendre des évidements permettant le passage de composants portés par l'autre carte de circuits imprimés.Another advantage of the structures described above consists in that one of the printed circuit boards can include recesses allowing the passage of components carried by the other printed circuit board.

Cette caractéristique se trouve illustrée sur la figure 7 dans laquelle le circuit imprimé CI₁ comprend un évidement rectangulaire 30 au travers duquel passe le boîtier 31 d'un composant électronique volumineux porté par l'autre circuit imprimé CI₂.This characteristic is illustrated in FIG. 7 in which the printed circuit CI₁ comprises a rectangular recess 30 through which the housing 31 of a large electronic component carried by the other printed circuit CI₂ passes.

Bien entendu, le nombre maximum de cadres utilisés dans une même structure n'est pas limité à deux : Ce nombre est variable en fonction des besoins et de la conception de la baie 1.Of course, the maximum number of frames used in the same structure is not limited to two: This number is variable depending on the needs and the design of rack 1.

Claims (17)

Structure modulaire porte-carte de circuit imprimé, apte à venir s'engager, à la façon d'un tiroir, dans une baie d'une installation électronique et à se connecter, grâce à des moyens de connexion intégrés, sur des éléments d'interconnexion prévus dans le fond de la baie, cette structure comprenant au moins un cadre (C) réalisé de préférence en une matière moulée, qui délimite au moins un volume plat de forme parallélépipédique et dont le bord intérieur, au moins en partie mouluré, présente des moyens de fixation (F₁, F₂) sur lesquels peut être fixée une carte de circuit imprimé (CI) contenue dans ledit volume,
caractérisée en ce que ledit cadre (C) comporte un montant antérieur (12) conformé de manière à présenter au moins une échancrure (17, 18, 19) dans laquelle est engagé et fixé au moins un groupe de connexion amovible (E₁, E₂, E₃) comprenant une pluralité d'éléments de connexion dont les parties internes (25) sont directement reliées, par l'intermédiaire de liaisons conductrices (26), à des plages conductrices (27) du circuit imprimé (CI), ce cadre (C) comprenant, par ailleurs, deux flancs latéraux munis de moyens de fixation, sur chacun desquels peuvent venir se fixer soit une plaque de fermeture (CP₁, CP₂), de préférence en un matériau thermiquement bon conducteur, soit un deuxième cadre (C) identique au premier.Modular structure for a printed circuit card holder, capable of engaging, like a drawer, in a bay of an electronic installation and of connecting, by means of integrated connection means, to elements of interconnection provided in the bottom of the bay, this structure comprising at least one frame (C) preferably made of a molded material, which delimits at least one flat volume of parallelepiped shape and whose inner edge, at least partially molded, has fixing means (F₁, F₂) on which a printed circuit board (CI) contained in said volume can be fixed,
characterized in that said frame (C) comprises a front upright (12) shaped so as to have at least one notch (17, 18, 19) in which is engaged and fixed at least one removable connection group (E₁, E₂, E₃) comprising a plurality of connection elements, the internal parts (25) of which are directly connected, via conductive links (26), to conductive pads (27) of the printed circuit (CI), this frame (C ) comprising, moreover, two lateral sides provided with fixing means, on each of which can be fixed either a closure plate (CP₁, CP₂), preferably made of a thermally good conductive material, or a second frame (C) identical at first. Structure selon la revendication 1,
caractérisée en ce que le susdit montant antérieur (12) du cadre (C) pourra comprendre sur sa face extérieure, des moyens de détrompage aptes à coopérer avec des moyens correspondants prévus dans le fond de la baie (1), pour interdire toute possibilité d'erreur de connexion.Structure according to claim 1,
characterized in that the aforesaid anterior upright (12) of the frame (C) may include on its outer face, polarizing means capable of cooperating with corresponding means provided in the bottom of the bay (1), to prevent any possibility of 'Connexion error. Structure selon la revendication 1,
caractérisée en ce que le montant postérieur (13) du cadre pourra est conformé de manière à recevoir au moins un mécanisme de verrouillage permettant de verrouiller la structure en position engagée et connectée à la baie (1).Structure according to claim 1,
characterized in that the rear upright (13) of the frame can be shaped so as to receive at least a locking mechanism for locking the structure in the engaged position and connected to the bay (1). Structure selon la revendication 3,
caractérisée en ce que le mécanisme de verrouillage fait intervenir un levier basculant (4) monté pivotant autour d'un axe (5) situé à proximité de la face inférieure du cadre (C) et dont la partie supérieure porte une pièce de verrouillage oscillante (6) dont une partie faisant office de pêne vient s'engager dans une conformation en forme de gâche (G) prévue sur la face postérieure (3) dudit cadre, l'extrémité inférieure du levier (4) en forme de fourche (8) étant destinée à venir s'engager dans un étrier (9) monté coulissant sur la face inférieure de la baie (1) et rappelé par un ressort vers l'intérieur de la baie.Structure according to claim 3,
characterized in that the locking mechanism involves a tilting lever (4) pivotally mounted about an axis (5) located near the underside of the frame (C) and the upper part of which carries an oscillating locking piece ( 6) of which a part acting as a bolt engages in a strike-shaped conformation (G) provided on the rear face (3) of said frame, the lower end of the lever (4) in the form of a fork (8) being intended to come and engage in a stirrup (9) slidingly mounted on the underside of the bay (1) and returned by a spring towards the interior of the bay. Structure selon l'une des revendications précédentes,
caractérisée en ce que le susdit cadre (C) comprend une traverse (11) qui s'étend dans sa partie médiane, parallèlement à ses montants antérieur et postérieur (12, 13), cette traverse (11) étant destinée à assurer le maintien et le raidissement de la carte de circuit imprimé (CI).Structure according to one of the preceding claims,
characterized in that the above-mentioned frame (C) comprises a crosspiece (11) which extends in its middle part, parallel to its front and rear uprights (12, 13), this crosspiece (11) being intended to maintain and stiffening of the printed circuit board (CI). Structure selon l'une des revendications précédentes,
caractérisée en ce que le montant postérieur (13) du cadre (C) présente une feuillure extérieure, en forme de L muni en sa partie médiane d'une conformation formant une demi gâche de manière à ce que lors de l'assemblage de deux cadres identiques, lesdites feuillures délimitent une rainure dans laquelle peut venir partiellement se loger le levier (4).Structure according to one of the preceding claims,
characterized in that the rear upright (13) of the frame (C) has an outer L-shaped rabbet provided in its middle part with a conformation forming a half keeper so that when two frames are assembled identical, said rebates delimit a groove in which the lever (4) can partially be housed. Structure selon l'une des revendications précédentes,
caractérisée en ce que les montants supérieur et inférieur des cadres (C₁, C₂) comprennent des orifices servant à la ventilation du volume intérieur de la structure modulaire.Structure according to one of the preceding claims,
characterized in that the upper and lower uprights of the frames (C₁, C₂) comprise orifices serving for the ventilation of the interior volume of the modular structure. Structure selon l'une des revendications précédentes,
caractérisée en ce que la susdite plaque de fermeture (CP₁, CP₂) est plane ou éventuellement bombée.Structure according to one of the preceding claims,
characterized in that the above closing plate (CP₁, CP₂) is flat or possibly curved. Structure selon l'une des revendications précédentes,
caractérisée en ce que la susdite plaque de fermeture est thermiquement reliée à des composants de la carte de circuit imprimé, soit directement, soit par l'intermédiaire d'éléments servant de ponts de conduction thermique.Structure according to one of the preceding claims,
characterized in that the aforesaid closure plate is thermally connected to components of the printed circuit board, either directly or by means of elements serving as thermal conduction bridges. Structure selon l'une des revendications précédentes,
caractérisée en ce que les ensembles de connexion (E₁, E₂, E₃) qui s'engagent dans les échancrures (17, 18, 19) présentent une forme sensiblement parallélépipédique et sont réalisés en deux blocs (B₁, B₂ - B'₁, B'₂) qui s'assemblent l'un à l'autre, au niveau d'un plan de jonction parallèle au plan de la carte de circuit imprimé (CI).Structure according to one of the preceding claims,
characterized in that the connection assemblies (E₁, E₂, E₃) which engage in the notches (17, 18, 19) have a substantially parallelepiped shape and are produced in two blocks (B₁, B₂ - B'B, B '₂) which are assembled together, at a junction plane parallel to the plane of the printed circuit board (CI). Structure selon la revendication 10,
caractérisée en ce que chaque bloc présente au moins une rangée de connecteurs dont les extrémités internes sont prolongées par des languettes élastiques (26) venant porter, par leurs extrémités, sur des plages conductrices (27) prévues sur le circuit imprimé.Structure according to claim 10,
characterized in that each block has at least one row of connectors, the internal ends of which are extended by elastic tongues (26) which bear, at their ends, on conductive pads (27) provided on the printed circuit. Structure selon l'une des revendications précédentes,
caractérisée en ce qu'elle comprend deux cadres (C₁, C₂) assemblés l'un à l'autre et portant chacun une carte de circuit imprimé (CI₁, CI₂), et en ce que les deux circuits imprimés sont interconnectés.Structure according to one of the preceding claims,
characterized in that it comprises two frames (C₁, C₂) assembled together and each carrying a card printed circuit (CI₁, CI₂), and in that the two printed circuits are interconnected. Structure selon l'une des revendications précédentes,
caractérisée en ce qu'elle comprend un joint périphérique (j₁, j₂) servant d'espaceur, situé entre au moins l'une des plaques de fermeture et le cadre (C₁, C₂).Structure according to one of the preceding claims,
characterized in that it comprises a peripheral seal (j₁, j₂) serving as a spacer, located between at least one of the closure plates and the frame (C₁, C₂). Structure selon l'une des revendications précédentes,
caractérisée en ce qu'elle comprend au moins deux cadres (C₁, C₂) et deux cartes de circuit imprimé (CI₁, CI₂), et en ce que l'une des deux cartes de circuit imprimé (CI₁) comprend un évidement rectangulaire (30) au travers duquel passe un composant électronique (31) porté par l'autre carte de circuit imprimé (CI₂).Structure according to one of the preceding claims,
characterized in that it comprises at least two frames (C₁, C₂) and two printed circuit boards (CI₁, CI₂), and in that one of the two printed circuit boards (CI₁) comprises a rectangular recess (30 ) through which an electronic component (31) carried by the other printed circuit board (CI₂) passes. Structure selon l'une des revendications précédentes,
caractérisée en ce que les cadres (C₁, C₂) sont munis de glissières permettant leur assemblage par coulissement total ou partiel.Structure according to one of the preceding claims,
characterized in that the frames (C₁, C₂) are provided with slides allowing their assembly by total or partial sliding. Structure selon l'une des revendications précédentes,
caractérisée en ce que les cadres (C₁, C₂) sont munis de glissières dans lesquelles peuvent venir s'engager, par coulissement total ou partiel, les plaques de fermeture (CP₁, CP₂).Structure according to one of the preceding claims,
characterized in that the frames (C₁, C₂) are provided with slides in which can engage, by total or partial sliding, the closure plates (CP₁, CP₂). Structure selon l'une des revendications précédentes,
caractérisée en ce que les bordures longitudinales du cadre comprennent des languettes (L₁) destinées à venir coopérer avec des languettes correspondantes (L₂) prévues sur les plaques de fermeture (CP₂) pour assurer un verrouillage par coulissement partiel desdites plaques sur lesdits cadres (C₂).Structure according to one of the preceding claims,
characterized in that the longitudinal edges of the frame include tongues (L₁) intended to come to cooperate with corresponding tongues (L₂) provided on the closure plates (CP₂) to ensure locking by partial sliding of said plates on said frames (C₂).
EP93401505A 1992-07-08 1993-06-11 Modular PCB-holder for drawer-like inserting in an electronic rack Expired - Lifetime EP0578520B1 (en)

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FR9208436 1992-07-08
FR929208436A FR2693621B1 (en) 1992-07-08 1992-07-08 Modular structure for a printed circuit card holder, capable of engaging, like a drawer, in a bay of an electronic installation.

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EP0578520A1 true EP0578520A1 (en) 1994-01-12
EP0578520B1 EP0578520B1 (en) 1998-01-28

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EP (1) EP0578520B1 (en)
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FR2778056A1 (en) * 1998-04-28 1999-10-29 Sextant Avionique Simplified printed circuit board holder for modular structure
WO1999056514A1 (en) * 1998-04-28 1999-11-04 Thomson-Csf Sextant Simplified modular structure
FR2910227A1 (en) * 2006-12-18 2008-06-20 Sagem Defense Securite INTEGRATED ELECTRONIC COMPONENT DEVICE PROVIDED WITH A VENTILATED ZONE SEPARATION PAN
EP1937048A1 (en) * 2006-12-18 2008-06-25 SAGEM Défense Sécurité Device with integrated electronic components equipped with a partition for separating ventilated areas
US7706141B2 (en) 2006-12-18 2010-04-27 Sagem Defense Sécurité Device with integrated electronic components provided with a partition for separating ventilated zones
FR2932585A1 (en) * 2008-06-17 2009-12-18 Messier Bugatti STRUCTURE OF A COMPUTER FOR AN AIRCRAFT AND ASSOCIATED REMOVABLE MODULES
WO2009153456A1 (en) * 2008-06-17 2009-12-23 Sagem Defense Securite Structure of a computer for an aircraft and of the associated removable modules

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FR2693621A1 (en) 1994-01-14
DE69316670T2 (en) 1998-09-24
EP0578520B1 (en) 1998-01-28
US5396401A (en) 1995-03-07
DE69316670D1 (en) 1998-03-05
FR2693621B1 (en) 1994-09-16

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